Metal bush.



E. J. RENKENBERGER.

METAL BUSH. I APPLIOA'TIOH FILED MAY a, 1913.

1,130,336. Patented M3112, 1915.

WTTE. s ra rns rarnr prion.

EDWARD J. RENKENBERGER, OF BUFFALO, NEW YORK, ASSIGI\TOR TO AMERICANTOOL HANDLE COMPAN Y, OF BUFFALO, NEW YORK, A. CORPORATION OF NEW YORK.

METAL BUSH.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed. May 3, 1913. Serial No. 765,330.

To all whom it may concern:

Be it known that I, EDWARD JoI-IN REN- KENBERGER, a citizen of theUnited States,

residing at Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Metal Bushes; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

This invention relates to improvements in metal bushes and it proposes adevice which is especially applicable for use with wooden handles, suchas the handles of clothes wringing machines, ice cream freezers, churns,and the like, but which of course has'a wide range of general utility.

The object of the invention is to provide a metal bush of simple andinexpensive character, which may be securely associated with the woodenhandle or other part to be protected, which shall always have a tightfit within the opening of said handle or equivalent part regardless ofany ordinary expansion thereof, and which may be fitted to the handle ina facile manner.

Having the above objects in view, the improved bush comprises aresilient sheet metal generally rectangular blank which is bent into theform of a ring and which has at one end thereof a wedge like projectionand at its other end a recess to receive said projection to a greater orless extent when the blank is formed as a ring.

Embodiments of the invention are illustrated in the accompanyingdrawings where- 1n:

Figure 1 is a sectional view showing a wooden handle with bushes inaccordance with the invention fitted thereto; Fig. 2 is a developed planview of the bush blank; Fig. 3 is a sectional view thereof on the line3-3 of Fig. 2. Fig. 4; is a sectional View showing one side of the bushas somewhat canted; Fig. 5 is an elevation of a bush of slightlymodified construction, and Fig. 6 is a sectional view thereof, appliedto a handle.

Similar characters of reference designate corresponding parts throughoutthe several views.

The improved bush is made from a geninserting it into the handle.

erally rectangular sheet metal blank 1, as shown in Figs. 2 and 3, andwhich is bent 1nto the form of a ring as shown in Fig. 1. That side ofthe blank which forms the outer surface of the ring is preferablyprovided with transverse flutings 2 or is otherwise roughened to insurethat the bush shall securely grip the part within which it is fitted.

The blank 1 has at one end thereof awedge shaped projection 3, centrallydisposed, and at its other end a recess 4 conforming to the projection 3and preferably forming the terminal of a slot 5. When the blank 1 isformed into a ring the projection 3 engages in the recess 4 as shown inFig. l. The projection 3 and the recess 4 are preferably located in linewith the longitudinal center of the blank in order that the ring may beslightly canted should occasion require while The ring formed in themanner described, is driven into the bore of the handle or equivalentpart under considerable pressure. The projection 3, engaging in therecess 4 causes the parts 6 and 7 at the sides of the slot 5 tospringoutward to a slight extent. The outward springing of the parts 6 and 7is, however, limited by the abutting engagement of the adjacent ends ofthe ring and in this way it is assured that the bush cannot becontracted beyond a certain minimum diameter. When the bush is driveninto place, there will be a certain local compression of the wood inwhich the bush fits but in the event that the bore in which the bush isarranged expands so that the external pressure on the bush is relieved,the resilient parts 6 and 7 acted on by the projection 3 will cause thebush to expand proportionately and to remain in secure frictionalengagement with the handle. The fact that the bush has a certaincapacity for expansion so that it always remains in secure frictionalengagement with the handle is important in view of the axio maticprinciple of practical mechanics that While a tight joint remains tighta loose joint rapidly becomes looser.

The frictional engagement between the bush and the handle preventsrelative rotation of these elements under any ordinary circumstances. Itmay happen however that the presence of accumulated dirt or grit maycause the handle A to bind on the pin B and in such a case thecorrugations 2 will prevent the handle from rotating on the bush.

The modified construction shown in Figs. 5 and 6 is the same in itsgeneral principles as the construction already described. In thismodified construction the blank 1 has a rib or flange 8 at one sidethereof, Which, when the blank is formed into a ring, serves as an endor thrust bearing for the handle, working in relation to the head 7) ofthe pin I3, and preferably has its inner face beveled or inclined asshown. In the embodi ment first described the projection 3 and therecess 4: are symmetrical. In the modified form the sides 3 and P of theprojection 3 and recess 4 adjacent to the rib 8 are parallel to said ribin order that when said projection engages in said recess, the tendencywill be to spread the blank on the wedge-shaped side of the projection,and the portion of the blank carrying the rib 8 and adjacent to the slot5 may not be displaced and consequently that the rib may not be bent outof a straight line or out of a true plane. In other respects theconstruction shown in Figs. 5 and 6 is the same as the constructionshown in the remaining figures. It will be apparent that the bushes,fitted at each end of the handle, protect the latter against wear,spacing the handle from the pin and rotating with the handle on saidpin.

Having fully described my invention I claim 1. A bush comprising a blankto be formed into a split ring and having at one end thereof aprojection and at its other end a recess to receive said projection, thelatter having a wedge fit in the recess and the projection at one pointhaving a width greater than the greatest width of the recess.

2. A bush comprising a blank to be formed into a split ring and havingat one end thereof a projection and having at its other end a relativelynarrow longitudinal slot terminating in an enlarged recess to receivesaid projection, the latter at its base having a greater width than thewidth of the recess and having a wedge fit in the recess.

3. A bush comprising a blank to be formed into a split ring and havingat one end thereof a wedge like projection and having at its other end arecess to receive the projection and formed with a. narrow longitudinalslot extending rearwardly from said recess.

a. A bush comprising a blank to be formed into a split ring and havingat one end thereof a projection and at its other end a recess to receivesaid projection, the base of the projection being of greater width thanthe mouth of the recess.

5. A bush comprising a blank to be formed into a split ring having oneface thereof corrugated, the blank having at one end thereof aprojection and at its other end a recess to receive said projection, thebase of the projection being of greater width than the mouth of therecess.

6. A bush comprising a blank to be formed into a split ring, the blankhaving at one side a flange and at one end a projection and at its otherend a slot terminating in a recess, one side of the recess and one sideof the projection being beveled and the other sides substantiallystraight and parallel with the side flange, the base of the projectionbeing of greater width than the mouth of the recess.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD J- RENKENBERGER.

Witnesses:

CHARLES L. BALLYWORK, GEORGE C. RENKENBERGER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eatents, Washington, D. C.

